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Finding the Fourth Proportional to 631.87, 946.72 and 446.38

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Solution

The fourth proportional to 631.87, 946.72 and 446.38 is: 668.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.87 : 946.72 = 446.38 : x
  2. Step 2: Convert to fraction form
    631.87/946.72 = 446.38/x
  3. Step 3: Cross multiply
    631.87x = 946.72 × 446.38
  4. Step 4: Simplify right side
    631.87x = 422,596.87
  5. Step 5: Solve for x
    x = 422,596.87/631.87
  6. Step 6: Final answer
    x = 668.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.